Smoke resistant fire door and method of use

Abstract

This invention relates to the field of fire door technology, specifically a smoke-blocking fire door, including a fire door frame, a fire door body mounted on the fire door frame via hinges, a door closer connected to the top of the fire door frame at the top, a handle mounted on the fire door body, and a smoke-blocking device mounted on the fire door body. The smoke-blocking device comprises a housing, a shaking device, a plate, a foam bottle, a nitrogen cylinder, pipes, a connector, and a metal tube. This invention injects foam between the fire door frame and the fire door body. The foam from the foam bottle is injected into the space between the fire door body and the fire door frame through the metal tube. The foam expands upon contact with air, filling and sealing the space between the fire door body and the fire door frame, preventing smoke from a fire from spreading upwards through the stairwell.

Description

Technical Field

[0001] This invention relates to the field of fire door technology, specifically a smoke-blocking fire door and its usage method. Background Technology

[0002] When a fire breaks out in a room or on a floor of a residential building, the fire can spread to the upper or lower floors, causing the fire to spread over a large area and increasing the damage to the fire and loss of life or property. Existing residential buildings or office buildings have fire alarm units to achieve the effect of warning.

[0003] Fire doors installed in stairwells of residential or office buildings offer some fire protection, but gaps exist between the door and the frame, and the stairwell ceiling is generally not sealed. This can easily create a chimney effect, allowing smoke from a fire to spread upwards and accelerating the fire's spread, causing greater damage.

[0004] Therefore, a smoke-blocking fireproof door and its usage method are invented. Summary of the Invention

[0005] The purpose of this invention is to provide a smoke-proof and fireproof door to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A smoke-blocking fireproof door includes a fireproof door frame, a fireproof door body installed on the fireproof door frame via hinges, the top of the fireproof door body being connected to the top of the fireproof door frame via a door closer, a handle being installed on the fireproof door body, and a smoke-blocking device installed on the fireproof door body.

[0008] The smoke-blocking device consists of a shell, a shaking device, a plate, a foam bottle, a nitrogen cylinder, pipes, a connector, and a metal pipe.

[0009] A shaking device is installed inside the housing, and a groove is opened on the circumference of the fire door body and corresponding to the position of the fire door frame. A metal tube is fixedly installed inside the groove.

[0010] The shaking device shakes the foam bottle and nitrogen bottle on the plate, and first opens the nitrogen bottle through the solenoid valve of the pipeline, so that the nitrogen in the nitrogen bottle is injected into the metal pipe. Then, the foam bottle is opened through the solenoid valve of the pipeline, so that the foam in the foam bottle is injected into the space between the fire door body and the fire door frame through the metal pipe.

[0011] In a preferred embodiment of the present invention, a through hole is provided on the housing, and a connector is fixedly installed inside the through hole corresponding to the position of the fire door body, and a pipe interface is provided at the front end of the connector.

[0012] In a preferred embodiment of the present invention, one end of the pipe is fixedly connected to the pipe interface, and the other end of the pipe is connected to a foam bottle and a nitrogen cylinder respectively, and a solenoid valve is installed on the pipe corresponding to the foam bottle and the nitrogen cylinder.

[0013] In a preferred embodiment of the present invention, the shaking device includes a motor, which is fixedly installed in the housing. A connecting rod is fixedly installed at the output end of the motor. The end of the connecting rod away from the motor is rotatably connected to a cylinder. A guide block is fixedly installed at the bottom of the plate. A strip-shaped through hole is opened in the middle of the guide block. The cylinder is connected in the strip-shaped through hole.

[0014] In a preferred embodiment of the present invention, guide rails are fixedly installed at both ends of the bottom of the plate, a slider is slidably connected to the bottom of the guide rails, the slider is fixedly installed in the housing, and a slot is fixedly installed on the top of the plate, the slot respectively engaging a foam bottle and a nitrogen bottle.

[0015] In a preferred embodiment of the present invention, a pipe groove is provided at the front end of the fire door body, and a metal pipe is installed inside the pipe groove. The pipe groove corresponds to the grooves at the top, bottom, left end and right end of the fire door body, and the metal pipe is connected to the interface of the pipe interface circumference.

[0016] In a preferred embodiment of the present invention, circular holes are uniformly opened on the metal tube inside the groove, and the circular holes correspond to the fire door frame.

[0017] In a preferred embodiment of the present invention, a battery and a controller are installed inside the housing. The controller is electrically connected to the fire alarm unit of the building. The battery is electrically connected to the controller. The controller is electrically connected to a motor and a solenoid valve.

[0018] In a preferred embodiment of the present invention, the door closer is configured as an electric door closer, and the door closer is electrically connected to the controller; a push switch is installed inside the handle, and the push switch is electrically connected to the controller.

[0019] The usage instructions are as follows:

[0020] S1: When the fire alarm unit of the building is activated, it will transmit an electrical signal to the controller;

[0021] S2: The controller activates the door closer to close the fire door body and the fire door frame;

[0022] S3: The controller starts the motor, which drives the connecting rod to rotate. The connecting rod passes through the cylinder and the guide block, causing the plate to reciprocate.

[0023] S4: The controller starts the solenoid valve of the corresponding nitrogen cylinder. The nitrogen inside the nitrogen cylinder is injected into the connector through the pipeline, and then injected into the metal pipe through the connector. Then the solenoid valve of the corresponding nitrogen cylinder is closed.

[0024] S5: The controller starts the solenoid valve of the corresponding foam bottle, the foam inside the foam bottle is injected into the connector, and then nitrogen is injected into the metal tube through the connector, and then the solenoid valve of the corresponding foam bottle is closed.

[0025] S6: Then, the solenoid valve of the corresponding nitrogen cylinder is activated by the controller. The nitrogen inside the nitrogen cylinder is injected into the connector through the pipeline, and then injected into the metal pipe through the connector. Then, the solenoid valve of the corresponding nitrogen cylinder is closed.

[0026] S7: When the handle is pressed down, it squeezes the push switch, which sends a signal to the controller. The controller then releases the door closer and closes the solenoid valve.

[0027] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

[0028] This invention involves injecting expanding foam between the fire door frame and the fire door body. The expanding foam from the foam bottle is injected into the space between the fire door body and the fire door frame through a metal tube. The expanding foam expands upon contact with air and fills the space between the fire door body and the fire door frame to seal it, preventing smoke from fire from spreading upwards through the stairwell.

[0029] A nitrogen cylinder is installed. The nitrogen cylinder is opened first through the solenoid valve of the pipeline, so that the nitrogen in the nitrogen cylinder is injected into the metal tube. There are two purposes for injecting nitrogen first: First, to remove dust or impurities inside the metal tube, so that the expanding foam can be sprayed out of the metal tube; Second, to fill the metal tube with nitrogen to prevent the expanding foam from expanding inside the metal tube and clogging the metal tube.

[0030] The pipe grooves correspond to the grooves at the top, bottom, left, and right ends of the fire door body, respectively. The metal pipe is connected to the circumferential interface of the pipe. This connection method facilitates the rapid injection of nitrogen or expanding foam into the circumference of the fire door body, thus accelerating the sealing speed.

[0031] A push-button switch is installed inside the handle. A pressure plate is fixedly installed on the side wall of the rotating pin inside the handle, and a push-button switch is set below the corresponding pressure plate. When the door is opened, the handle is rotated down, the pressure plate squeezes the push-button switch, and the push-button switch is electrically connected to the controller. The controller releases the door closer and closes the solenoid valve to prevent the continuously sprayed foam from affecting the escape of personnel when they open the fire door to escape. Attached Figure Description

[0032] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0033] Figure 1 A front view of a smoke-proof and fireproof door and its usage method;

[0034] Figure 2 A front view of the fire door body in a smoke-proof fireproof door and its usage method;

[0035] Figure 3 Left view of a smoke-proof fireproof door and its usage method;

[0036] Figure 4 Left view of a smoke-proof fire door and its usage method, showing a metal pipe installed on the fire door body;

[0037] Figure 5 A cross-sectional view of a metal tube in a smoke-proof and fireproof door and its usage method;

[0038] Figure 6 A schematic diagram of the structure in which the shell of a smoke-proof fireproof door is installed on the fire door body in its usage method;

[0039] Figure 7 This is a schematic diagram of the internal structure of the shell of a smoke-proof and fireproof door and its usage method.

[0040] Figure 8 A schematic diagram of a smoke-proof and fireproof door and its usage method, showing a slider mounted on the housing.

[0041] Figure 9 This is a schematic diagram of the structure of the plate and shell in a smoke-proof and fireproof door and its usage method;

[0042] Figure 10 A schematic diagram of a smoke-proof and fireproof door and its usage method, showing the guide block installed on the plate.

[0043] Figure 11 This is a schematic diagram of a smoke-proof and fireproof door and its usage method, showing the battery and controller installed in the housing structure.

[0044] In the diagram: fire door frame 100, fire door body 200, groove 210, hinge 220, handle 230, door closer 300, housing 400, through hole 410, motor 510, connecting rod 520, cylinder 530, guide block 540, strip through hole 550, plate 600, guide rail 610, slider 620, slot 630, expanding foam bottle 700, nitrogen cylinder 800, pipe 900, solenoid valve 910, connector 1000, pipe interface 1100, metal pipe 1200, round hole 1210, pipe groove 1300, storage battery 1400, controller 1500. Detailed Implementation

[0045] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0046] Please refer to Figure 1-11 The fire door includes a fire door frame 100, a fire door body 200 mounted on the fire door frame 100 via hinges 220, a fire door body 200 connected to the top of the fire door frame 100 via a door closer 300, a handle 230 mounted on the fire door body 200, and a smoke blocking device mounted on the fire door body 200. The smoke blocking device consists of a housing 400, a shaking device, a plate 600, a foam bottle 700, a nitrogen cylinder 800, a pipe 900, a connector 1000, and a metal pipe 1200. The shaking device is installed inside the housing 400, and a groove 210 is formed on the circumference of the fire door body 200 corresponding to the position of the fire door frame 100. The metal pipe 1200 is fixedly installed inside the groove 210.

[0047] The shaking device shakes the expanding foam bottle 700 and nitrogen bottle 800 on the plate 600. The purpose of shaking the expanding foam bottle 700 and nitrogen bottle 800 is to shake the liquid inside the bottle thoroughly so that the expanding foam can be sprayed out evenly.

[0048] The nitrogen cylinder 800 is first opened via solenoid valve 910 of pipe 900, allowing nitrogen gas from the cylinder to be injected into metal tube 1200. The purpose of injecting nitrogen first is twofold: first, to remove dust or impurities from inside metal tube 1200, facilitating the spraying of expanding foam; second, to prevent the expanding foam from expanding and clogging metal tube 1200 by filling it with nitrogen. Then, the nitrogen gas is injected via solenoid valve 910 of pipe 900. Foam bottle 700 allows the foam in the foam bottle 700 to be injected into the space between the fire door body 200 and the fire door frame 100 through the metal tube 1200. The foam expands when it comes into contact with air and fills the space between the fire door body 200 and the fire door frame 100 to seal it, preventing the smoke from the fire from spreading upward through the stairwell. The foam is composed of polyurethane prepolymer, foaming agent, catalyst, crosslinking agent, etc., filled into a high-pressure resistant iron can and filled with gases such as propane, and has a flame-retardant effect.

[0049] The housing 400 has a through hole 410. Inside the through hole 410, a connector 1000 is fixedly installed at the position corresponding to the fire door body 200. The front end of the connector 1000 has a pipe interface 1100. One end of the pipe 900 is fixedly connected to the pipe interface 1100. The other end of the pipe 900 is connected to the foam bottle 700 and the nitrogen cylinder 800 respectively. A solenoid valve 910 is installed on the pipe 900 corresponding to the foam bottle 700 and the nitrogen cylinder 800. The pipe 900 is a flexible hose and a certain length is reserved to prevent the pipe 900 from detaching from the foam bottle 700 and the nitrogen cylinder 800 when the plate 600 moves back and forth.

[0050] The shaking device includes a motor 510, which is fixedly installed inside the housing 400. A connecting rod 520 is fixedly installed at the output end of the motor 510. The end of the connecting rod 520 away from the motor 510 is rotatably connected to a cylinder 530. A guide block 540 is fixedly installed at the bottom of the plate 600. A strip-shaped through hole 550 is opened in the middle of the guide block 540. The cylinder 530 is connected inside the strip-shaped through hole 550. The motor 510 drives the connecting rod 520 to rotate. The connecting rod 520, through the cylinder 530 and the guide block 540, drives the plate 600 to reciprocate and shake.

[0051] Guide rails 610 are fixedly installed at both ends of the bottom of the plate 600. A slider 620 is slidably connected to the bottom of the guide rails 610. The slider 620 is fixedly installed inside the housing 400. A slot 630 is fixedly installed at the top of the plate 600. The slot 630 respectively engages the expanding foam bottle 700 and the nitrogen bottle 800. The guide rails 610 and the slider 620 guide the plate 600, and the slot 630 fixes the expanding foam bottle 700 and the nitrogen bottle 800.

[0052] A pipe groove 1300 is opened at the front end of the fire door body 200. A metal pipe 1200 is installed inside the pipe groove 1300. The pipe groove 1300 corresponds to the grooves 210 at the top, bottom, left and right ends of the fire door body 200. The metal pipe 1200 is connected to the interface of the pipe interface 1100 around the circumference. This connection method facilitates the rapid injection of nitrogen or foam into the circumference of the fire door body 200.

[0053] Circular holes 1210 are evenly opened on the metal tube 1200 inside the groove 210, and the circular holes 1210 correspond to the fire door frame 100; a storage battery 1400 and a controller 1500 are installed inside the housing 400. The controller 1500 is electrically connected to the fire alarm unit of the building (not marked in the figure), the storage battery 1400 is electrically connected to the controller 1500, and the controller 1500 is electrically connected to the motor 510 and the solenoid valve 910.

[0054] The door closer 300 is set as an electric door closer, as can be found in publication number CN105971442A, patent name: Electric Door Closer for Fire Doors. The door closer 300 is electrically connected to the controller 1500. A push switch is installed inside the handle 230. A pressure plate is fixedly installed on the side wall of the rotating pin inside the handle, and a push switch is set below the corresponding pressure plate. When the door is opened, the handle is rotated down, the pressure plate squeezes the push switch, and the push switch is electrically connected to the controller 1500. The controller 1500 releases the door closer 300 and closes the solenoid valve 910 to prevent the continuously sprayed foam from affecting the escape of personnel when they open the fire door to escape.

[0055] The working principle of this invention is as follows: When the fire alarm unit of the building is activated, it transmits an electrical signal to the controller 1500; the controller 1500 activates the door closer 300 to close the fire door body 200 and the fire door frame 100; the controller 1500 activates the motor 510, which drives the connecting rod 520 to rotate, and the connecting rod 520 drives the plate 600 to reciprocate through the cylinder 530 and the guide block 540; the controller 1500 activates the solenoid valve 910 corresponding to the nitrogen cylinder 800, and the nitrogen inside the nitrogen cylinder 800 is injected into the connector 1000 through the pipe 900, and then injected into the metal pipe 1200 through the connector 1000, and then the solenoid valve 910 corresponding to the nitrogen cylinder 800 is closed; the controller 1500 activates the solenoid valve 910 corresponding to the expanding foam bottle 700, and the expanding foam bottle... The expanding foam inside the 700 is injected into the connector 1000, and then nitrogen is injected into the metal tube 1200 through the connector 1000. Then the solenoid valve 910 of the corresponding expanding foam bottle 700 is closed. Then the solenoid valve 910 of the corresponding nitrogen bottle 800 is activated through the controller 1500. The nitrogen inside the nitrogen bottle 800 is injected into the connector 1000 through the pipe 900, and then the nitrogen is injected into the metal tube 1200 through the connector 1000. Then the solenoid valve 910 of the corresponding nitrogen bottle 800 is closed. The purpose of injecting nitrogen again is to expel the expanding foam inside the metal tube and prevent the expanding foam from expanding and blocking the metal tube. When the handle 230 is pressed down, its handle squeezes the press switch. The press switch sends a signal to the controller 1500. The controller 1500 releases the door closer 300 and closes the solenoid valve 910.

[0056] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A smoke-proof fireproof door, comprising a fireproof door frame (100), a fireproof door body (200) mounted on the fireproof door frame (100) via a hinge (220), the top of the fireproof door body (200) being connected to the top of the fireproof door frame (100) via a door closer (300), and a handle (230) mounted on the fireproof door body (200), characterized in that: It also includes a smoke-blocking device installed on the fire door body (200); The smoke-blocking device consists of a housing (400), a shaking device, a plate (600), a foam bottle (700), a nitrogen cylinder (800), a pipe (900), a connector (1000), and a metal pipe (1200); A shaking device is installed inside the housing (400), and a groove (210) is opened on the circumference of the fire door body (200) and corresponding to the position of the fire door frame (100). A metal tube (1200) is fixedly installed inside the groove (210). The shaking device shakes the foam bottle (700) and nitrogen bottle (800) on the plate (600), and first opens the nitrogen bottle (800) through the solenoid valve (910) of the pipeline (900) so that the nitrogen in the nitrogen bottle (800) is injected into the metal pipe (1200). Then, the foam bottle (700) is opened through the solenoid valve (910) of the pipeline (900) so that the foam in the foam bottle (700) is injected into the space between the fire door body (200) and the fire door frame (100) through the metal pipe (1200). The shaking device includes a motor (510), which is fixedly installed inside the housing (400). A connecting rod (520) is fixedly installed at the output end of the motor (510). The end of the connecting rod (520) away from the motor (510) is rotatably connected to a cylinder (530). A guide block (540) is fixedly installed at the bottom of the plate (600). A strip-shaped through hole (550) is opened in the middle of the guide block (540). The cylinder (530) is connected inside the strip-shaped through hole (550). The fire door body (200) has a pipe groove (1300) at the front end, and a metal pipe (1200) is installed inside the pipe groove (1300). The pipe groove (1300) corresponds to the grooves (210) at the top, bottom, left and right ends of the fire door body (200). The metal pipe (1200) is connected to the interface around the pipe interface (1100). Circular holes (1210) are evenly opened on the metal tube (1200) inside the groove (210), and the circular holes (1210) correspond to the fire door frame (100).

2. The smoke-proof and fireproof door according to claim 1, characterized in that, The housing (400) has a through hole (410), and a connector (1000) is fixedly installed inside the through hole (410) at the position corresponding to the fire door body (200). The connector (1000) has a pipe interface (1100) at its front end.

3. A smoke-proof and fireproof door according to claim 2, characterized in that, One end of the pipe (900) is fixedly connected to the pipe interface (1100), and the other end of the pipe (900) is connected to the foam bottle (700) and the nitrogen cylinder (800) respectively. A solenoid valve (910) is installed on the pipe (900) corresponding to the foam bottle (700) and the nitrogen cylinder (800).

4. A smoke-proof and fireproof door according to claim 1, characterized in that, Guide rails (610) are fixedly installed at both ends of the bottom of the plate (600). A slider (620) is slidably connected to the bottom of the guide rails (610). The slider (620) is fixedly installed inside the housing (400). A slot (630) is fixedly installed at the top of the plate (600). The slot (630) respectively engages the expanding foam bottle (700) and the nitrogen cylinder (800).

5. A smoke-proof and fireproof door according to claim 1, characterized in that, The housing (400) houses a battery (1400) and a controller (1500). The controller (1500) is electrically connected to the fire alarm unit of the building. The battery (1400) is electrically connected to the controller (1500). The controller (1500) is electrically connected to a motor (510) and a solenoid valve (910).

6. A smoke-proof and fireproof door according to claim 1, characterized in that, The door closer (300) is configured as an electric door closer, and the door closer (300) is electrically connected to the controller (1500); a push switch is installed inside the handle (230), and the push switch is electrically connected to the controller (1500).

7. A smoke-proof and fireproof door according to claim 1, characterized in that, The usage instructions are as follows: S1: When the fire alarm unit of the building is activated, it will transmit an electrical signal to the controller (1500); S2: The controller (1500) activates the door closer (300) to close the fire door body (200) and the fire door frame (100); S3: The controller (1500) starts the motor (510), the motor (510) drives the connecting rod (520) to rotate, and the connecting rod (520) drives the plate (600) to reciprocate through the cylinder (530) and the guide block (540); S4: The controller (1500) activates the solenoid valve (910) of the corresponding nitrogen cylinder (800). The nitrogen inside the nitrogen cylinder (800) is injected into the connector (1000) through the pipe (900), and then injected into the metal pipe (1200) through the connector (1000). Then the solenoid valve (910) of the corresponding nitrogen cylinder (800) is closed. S5: The controller (1500) starts the solenoid valve (910) of the corresponding foam bottle (700), the foam inside the foam bottle (700) is injected into the connector (1000), and then nitrogen is injected into the metal tube (1200) through the connector (1000), and then the solenoid valve (910) of the corresponding foam bottle (700) is closed. S6: Then, the solenoid valve (910) of the corresponding nitrogen cylinder (800) is activated by the controller (1500). The nitrogen inside the nitrogen cylinder (800) is injected into the connector (1000) through the pipe (900), and then the nitrogen is injected into the metal pipe (1200) through the connector (1000). Then, the solenoid valve (910) of the corresponding nitrogen cylinder (800) is closed. S7: When the handle (230) is pressed down, the handle squeezes the press switch, the press switch sends a signal to the controller (1500), the controller (1500) releases the door closer (300) and closes the solenoid valve (910).

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